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Finding the Fourth Proportional to 499,290.39, 689,020.71 and 272,935.89

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Solution

The fourth proportional to 499,290.39, 689,020.71 and 272,935.89 is: 376,651.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,290.39 : 689,020.71 = 272,935.89 : x
  2. Step 2: Convert to fraction form
    499,290.39/689,020.71 = 272,935.89/x
  3. Step 3: Cross multiply
    499,290.39x = 689,020.71 × 272,935.89
  4. Step 4: Simplify right side
    499,290.39x = 188,058,480,712.28
  5. Step 5: Solve for x
    x = 188,058,480,712.28/499,290.39
  6. Step 6: Final answer
    x = 376,651.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.